If you want to add a Twitter, Facebook, Google+, etc, account, click the "Add Social Network" button towards the top left corner of the dashboard.Once there you will be prompted with the box seen below. For this example, we're connecting a twitter account. Click "Connect with Twitter". Then it will ask you to log in.

Once you log in, you will be prompted to add a stream. If not, then simply click "Add Stream" in the top left corner of your dashboard. Once there, click on whatever streams you would like to monitor. If you are more concerned about your Home Feed, Mentions, and Favorite Tweets, simply click the plus button next to those streams and they will be added to your dashboard under your twitter feed.

The process is basically the same for the other platforms, follow the same basic instructions seen above.